Method, device, system and storage medium for reducing measurement signalling in LTE network

Abstract

A method, eNB, UE and system for reducing measurement signalling in a LTE network at an eNB side are provided, including: a reported measurement result containing a physical cell identifier of a neighboring cell is received; the physical cell identifier of the neighboring cell is mapped; and the physical cell identifier of the neighboring cell is sent when determined to be unsuccessfully mapped. Another method for reducing measurement signalling in an LTE network at a UE side is also provided, including: signal strengths of a serving cell and a neighboring cell are measured, and a measurement result is reported; and when the measurement is performed again after an unsuccessfully-mapped physical cell identifier of the neighboring cell is received, a physical cell of the neighboring cell corresponding to the unsuccessfully-mapped physical cell identifier of the neighboring cell is not measured.

What is claimed is: 
     
       1. A method for reducing measurement signalling in a Long Term Evolution (LTE) network, comprising:
 receiving, by an evolved Node B (eNB), a reported measurement result containing a physical cell identifier of a neighbouring cell from a User Equipment (UE), mapping, by the eNB, the physical cell identifier of the neighbouring cell, and sending, by the eNB, the physical cell identifier of the neighbouring cell to the UE when the physical cell identifier of the neighbouring cell is determined to be unsuccessfully mapped; 
 wherein sending, by the eNB, the physical cell identifier of the neighbouring cell to the UE when the physical cell identifier of the neighbouring cell is determined to be unsuccessfully mapped comprises: 
 determining, by the eNB, the unsuccessfully-mapped physical cell identifier of the neighbouring cell as a physical cell identifier of an unknown neighbouring cell, and recording, by the eNB, the physical cell identifier of the unknown neighbouring cell in a list of physical cell identifiers of unknown neighbouring cells; 
 writing, by the eNB, the list of physical cell identifiers of unknown neighbouring cells into an Information Element (IE), which is Black Cells To Add Mod List, of a measured object; and 
 sending, by the eNB, a Radio Resource Control protocol (RRC) Connection Reconfiguration message carrying the IE to the UE. 
 
     
     
       2. The method for reducing measurement signalling in an LTE network according to  claim 1 , wherein mapping, by the eNB, the physical cell identifier of the neighbouring cell comprises:
 acquiring, by the eNB, a physical cell mapping rule, and mapping the physical cell identifier of the neighbouring cell into an Evolved Cell Global Identifier (ECGI) according to the physical cell mapping rule, the ECGI being configured to determine a target cell of handover. 
 
     
     
       3. A method for reducing measurement signalling in a Long Term Evolution (LTE) network, comprising:
 measuring, by a User Equipment (UE), signal strengths of a serving cell and a neighbouring cell, reporting, by the UE, a measurement result, and when the measurement is performed by the UE again after an unsuccessfully-mapped physical cell identifier of the neighbouring cell is received from an evolved Node B (eNB) by the UE, not measuring, by the UE, a physical cell of the neighbouring cell corresponding to the unsuccessfully-mapped physical cell identifier of the neighbouring cell; 
 wherein the unsuccessfully-mapped physical cell identifier of the neighbouring cell is received from the eNB by the UE through a Radio Resource Control protocol (RRC) Connection Reconfiguration message carrying an Information Element (IE), which is Black Cells To Add Mod List, of a measured object; wherein the IE comprises a list of physical cell identifiers of unknown neighbouring cells, and the unsuccessfully-mapped physical cell identifier of the neighbouring cell is a physical cell identifier of an unknown neighbouring cell. 
 
     
     
       4. The method for reducing measurement signalling in an LTE network according to  claim 3 , wherein reporting, by the UE, the measurement result comprises:
 reporting, by the UE, the measurement result through a Measurement Report carrying the signal strengths of the serving cell and the neighbouring cell as well as the physical cell identifier of the neighbouring cell. 
 
     
     
       5. A method for reducing measurement signalling in a Long Term Evolution (LTE) network, comprising:
 measuring, by a User Equipment (UE), signal strengths of a serving cell and a neighbouring cell, and reporting, by the UE, a measurement result; 
 receiving, by an evolved Node B (eNB), the reported measurement result containing a physical cell identifier of the neighbouring cell, mapping, by the eNB, the physical cell identifier of the neighbouring cell, and sending, by the eNB, the physical cell identifier of the neighbouring cell when the physical cell identifier of the neighbouring cell is determined to be unsuccessfully mapped; and 
 when the measurement is performed by the UE again after the unsuccessfully-mapped physical cell identifier of the neighbouring cell is received by the UE, not measuring, by the UE, a physical cell of the neighbouring cell corresponding to the unsuccessfully-mapped physical cell identifier of the neighbouring cell; 
 wherein sending, by the eNB, the physical cell identifier of the neighbouring cell when the physical cell identifier of the neighbouring cell is determined to be unsuccessfully mapped comprises: 
 determining, by the eNB, the unsuccessfully-mapped physical cell identifier of the neighbouring cell as a physical cell identifier of an unknown neighbouring cell, and recording, by the eNB, the physical cell identifier of the unknown neighbouring cell in a list of physical cell identifiers of unknown neighbouring cells; 
 writing, by the eNB, the list of physical cell identifiers of unknown neighbouring cells into an Information Element (IE), which is Black Cells To Add Mod List, of a measured object; and 
 sending, by the eNB, a Radio Resource Control protocol (RRC) Connection Reconfiguration message carrying the IE to the UE. 
 
     
     
       6. The method for reducing measurement signalling in an LTE network according to  claim 5 , wherein mapping, by the eNB, the physical cell identifier of the neighbouring cell comprises:
 acquiring, by the eNB, a physical cell mapping rule, and mapping the physical cell identifier of the neighbouring cell into an Evolved Cell Global Identifier (ECGI) according to the physical cell mapping rule, the ECGI being configured to determine a target cell of handover. 
 
     
     
       7. The method for reducing measurement signalling in an LTE network according to  claim 5 , wherein reporting, by the UE, the measurement result comprises:
 reporting, by the UE, the measurement result through a Measurement Report carrying the signal strengths of the serving cell and the neighbouring cell and the physical cell identifier of the neighbouring cell. 
 
     
     
       8. An evolved Node B (eNB), comprising: a first receiving unit, a first processing unit and a first sending unit, wherein
 the first receiving unit is configured to receive from a User Equipment (UE) a reported measurement result containing a physical cell identifier of a neighbouring cell; 
 the first processing unit is configured to acquire a physical cell mapping rule, map the physical cell identifier of the neighbouring cell according to the physical cell mapping rule, and determine the physical cell identifier of the neighbouring cell which is unsuccessfully mapped; and 
 the first sending unit is configured to send the unsuccessfully-mapped physical cell identifier of the neighbouring cell to the UE; 
 the first sending unit is further configured to send the unsuccessfully-mapped physical cell identifier of the neighbouring cell to the UE through a Radio Resource Control protocol (RRC) Connection Reconfiguration message carrying an Information Element (IE), which is Black Cells To Add Mod List, of a measured object; wherein the unsuccessfully-mapped physical cell identifier of the neighbouring cell is determined as a physical cell identifier of an unknown neighbouring cell and a list of physical cell identifiers of unknown neighbouring cells is written into the IE. 
 
     
     
       9. The eNB according to  claim 8 , wherein the first processing unit is configured to: map the physical cell identifier of the neighbouring cell into an Evolved Cell Global Identifier (ECGI) according to the physical cell mapping rule, the ECGI being configured to determine a target cell of handover. 
     
     
       10. A User Equipment (UE), comprising: a second sending unit and a second receiving unit, wherein
 the second sending unit is configured to measure signal strengths of a serving cell and a neighbouring cell, and report a measurement result to an evolved Node B (eNB); 
 the second receiving unit is configured to receive from the eNB a physical cell identifier of the neighbouring cell which is unsuccessfully mapped; and 
 the second sending unit is further configured to measure the signal strengths of the serving cell and the neighbouring cell again, then report a measurement result to the eNB, and not measure a physical cell of the neighbouring cell corresponding to the unsuccessfully-mapped physical cell identifier of the neighbouring cell when the measurement is performed again; 
 the second receiving unit is further configured to receive from the eNB the unsuccessfully-mapped physical cell identifier of the neighbouring cell through a Radio Resource Control protocol (RRC) Connection Reconfiguration message carrying an Information Element (IE), which is Black Cells To Add Mod List, of a measured object; wherein the IE comprises a list of physical cell identifiers of unknown neighbouring cells, and the unsuccessfully-mapped physical cell identifier of the neighbouring cell is a physical cell identifier of an unknown neighbouring cell. 
 
     
     
       11. The UE according to  claim 10 , wherein
 the second sending unit is configured to report the measurement result through a Measurement Report carrying the signal strength of the serving cell, the physical cell identifier of the neighbouring cell and the signal strength of the neighbouring cell to the eNB. 
 
     
     
       12. A system for reducing measurement signalling in a Long Term Evolution (LTE) network, comprising an evolved Node B (eNB) according to  claim 8  and a User Equipment (UE) comprising a second sending unit and a second receiving unit, wherein
 the second sending unit is configured to measure signal strengths of a serving cell and a neighbouring cell, and report a measurement result to the eNB; 
 the second receiving unit is configured to receive from the eNB a physical cell identifier of the neighbouring cell which is unsuccessfully mapped; and 
 the second sending unit is further configured to measure the signal strengths of the serving cell and the neighbouring cell again, then report a measurement result to the eNB, and not measure a physical cell of the neighbouring cell corresponding to the unsuccessfully-mapped physical cell identifier of the neighbouring cell when the measurement is performed again. 
 
     
     
       13. A non-transitory computer storage medium, storing computer executable instructions configured to execute a method for reducing measurement signalling in a Long Term Evolution (LTE) network according to  claim 1 . 
     
     
       14. A non-transitory computer storage medium, storing computer executable instructions configured to execute a method for reducing measurement signalling in a Long Term Evolution (LTE) network according to  claim 3 . 
     
     
       15. A non-transitory computer storage medium, storing computer executable instructions configured to execute a method for reducing measurement signalling in a Long Term Evolution (LTE) network according to  claim 5 .